Detachable three-piece chair

ABSTRACT

A detachable chair includes a first frame member including two first side rails having a lengthwise slit, front first cross rails, and rear second cross rails; a second frame member including two second side rails, first seat rails having either end portion projecting laterally out of the second side rail, and a second seat rail disposed rearward of the first seat rails and having either end being about flush with an outer surface of the second side rail; and a backrest including two side sheaths adapted to insert through the slits and fastened by rods. Inserting the second frame member through a gap between one second cross rail and one first cross rail until being stopped by the first frame member with the second side rails rested upon one first cross rail will assemble the inclined frame members as a chair.

BACKGROUND OF THE INVENTION

1. Field of Invention

The present invention relates to folding chairs and more particularly toa chair comprising two frame members and a backrest, these componentsadapted to easily either assemble or detach without involving any tool.

2. Related Art

Folding chairs are well known. Conventionally, a folding chair has oneor more hinges (or pivots) each for pivotably connecting two componentsthereof. As such, the chair can be folded, for example in a storagestate.

But this is unsatisfactory for the purpose for which the invention isconcerned for the following reasons: The provision of hinges cancomplicate the manufacturing process. Further, it is not durable. Thatis, its useful life is short. Thus, the need for improvement stillexists.

SUMMARY OF THE INVENTION

It is therefore an object of the present invention to provide adetachable chair comprising two frame members and a backrest, thesecomponents being adapted to easily either assemble or detach withoutinvolving any tool.

To achieve the above and other objects, the present invention provides adetachable chair comprising a first frame member including two parallelfirst side rails having a leg and a lengthwise slit, a plurality offront first cross rails interconnecting the first side rails, and aplurality of rear second cross rails interconnecting the first siderails; a second frame member including two parallel second side railshaving a leg, a plurality of first seat rails interconnecting the secondside rails and having either end portion projecting laterally out of thesecond side rail, and a second seat rail disposed rearward of the firstseat rails and interconnecting the second side rails, the second seatrail having either end being about flush with an outer surface of thesecond side rail wherein a transverse length of the second frame memberis smaller than a distance between inner side surfaces of the first siderails by a predetermined minimum value; and a backrest including asheath at either side, the sheaths being adapted to insert through theslits to dispose internally of the first side rails, and two stopmembers disposed through the sheaths and urged against the slits;whereby inserting the second frame member through a gap between one ofthe second cross rails and one of the first cross rails until beingstopped by the first frame member with the second side rails rested uponone of the first cross rails will assemble the inclined first and secondframe members as a chair.

In one aspect of the present invention each of the legs of the firstside rails has an inclined bottom.

The above and other objects, features and advantages of the presentinvention will become apparent from the following detailed descriptiontaken with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a preferred embodiment of detachablechair according to the invention;

FIG. 2 is a perspective view of the detached first and second framemembers;

FIG. 3 is a perspective view of the detached first and second framemembers being assembled as a flat piece prior to storage;

FIG. 4 is a perspective view of the detached first and second framemembers having been assembled as a flat piece in a storage state; and

FIGS. 5, 6, and 7 are perspective views illustrating three steps offorming the backrest of the chair by assembling a rectangular memberwith the side rails respectively.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 1 to 7, a detachable chair in accordance with apreferred embodiment of the invention comprises a first frame member 10and a second frame member 20. Each component is discussed in detailedbelow.

The first frame member 10 comprises two parallel first side rails 11having a leg 111 and an intermediate, lengthwise slit 15, a plurality offront first cross rails 13 interconnecting front surfaces of the firstside rails 11, a plurality of rear second cross rails 12 interconnectingrear surfaces of the first side rails 11, and a third cross rail 14interconnecting inner side surfaces of the first side rails 11, thethird cross rail 14 being disposed lower than the lowest first crossrail 13.

The second frame member 20 comprises two parallel second side rails 22having a leg 24, the second side rails 22 being shorter than the firstside rails 11, a plurality of first seat rails 21 interconnecting uppersurfaces of the second side rails 22, each first seat rail 21 having anend portion 211 projecting laterally out of the second side rail 22, anda second seat rail 23 disposed in a rear of the first seat rails 21 andinterconnecting the upper surfaces of the second side rails 22, thesecond seat rail 23 having either end 232 flush with an outer sidesurface of the second side rail 22. As such, a rear surface of thesecond seat rail 23 is engaged with and stopped by a lower front portionof the lowest rear second cross rail 12, the second side rails 22 arerested upon the lowest first cross rail 13, and the legs 111 and 24 aresupported on the ground in response to inserting the second frame member20 through a gap between the lowest first cross rail 13 and the lowestrear second cross rail 12 in a process of assembling both the first andsecond frame members 10 and 20 as a chair. Note that each of the legs111 has an inclined bottom and each of the legs 24 has an inclinedportion such that the assembled chair can stand firmly on the ground(see FIG. 1). It is also shown in FIG. 1 that either end of each of thefirst seat rails 21 is flush with an outer side surface of each of thefirst side rails 11 in the assembled state of the chair. In view of theabove, the assembling process of the chair is very easy and simple.Also, the assembled chair can stand firmly and withstand the weight of aperson sit on the first seat rails 21. Further, a transverse length ofthe second frame member 20 is slightly smaller than a distance betweenthe inner side surfaces of the first side rails 11. Thus, the detachedfirst and second frame members 10 and 20 can be assembled as a flatpiece prior to storage (see FIGS. 2, 3, and 4).

For the comfort of a person sitting on the chair, a backrest 40 isprovided by referring to FIGS. 5 to 7 specifically. The backrest 40 isformed of a fabric or an elastomeric material. The backrest 40 isrectangular and comprises a sheath 41 at either side. The sheath 41 hasa length slightly smaller than that of the slit 15 (see FIG. 5). Inassembly, the sheaths 41 are adapted to insert through the slits 15 todispose internally of the first side rails 11 (see FIG. 6). Next, inserta cylindrical rod 42 having a length longer than that of each of theslit 15 and the sheath 41 through the sheath 41 until both ends of therod 41 are disposed externally of the sheaths 41 (see FIG. 7). In thisposition, the backrest 40 is secured across the slits 15 since thesheaths 41 are prevented from passing through the slits 15 when a forceis exerted upon the backrest 40 due to the stopping effect of the rods42. Thus, a person sifting on the first seat rails 21 can comfortablyrest the back on the backrest 40.

While the invention herein disclosed has been described by means ofspecific embodiments, numerous modifications and variations could bemade thereto by those skilled in the art without departing from thescope and spirit of the invention set forth in the claims.

1. A detachable chair comprising: a first frame member including twoparallel first side rails having a leg and a lengthwise slit, aplurality of front first cross rails interconnecting the first siderails, and a plurality of rear second cross rails interconnecting thefirst side rails; a second frame member including two parallel secondside rails having a leg, a plurality of first seat rails interconnectingthe second side rails and having either end portion projecting laterallyout of the second side rail, and a second seat rail disposed rearward ofthe first seat rails and interconnecting the second side rails, thesecond seat rail having either end being about flush with an outersurface of the second side rail wherein a transverse length of thesecond frame member is smaller than a distance between inner sidesurfaces of the first side rails by a predetermined minimum value; and abackrest including a sheath at either side, the sheaths being adapted toinsert through the slits to dispose internally of the first side rails,and two stop members disposed through the sheaths and urged against theslits; whereby inserting the second frame member through a gap betweenone of the second cross rails and one of the first cross rails untilbeing stopped by the first frame member with the second side railsrested upon one of the first cross rails will assemble the inclinedfirst and second frame members as a chair.
 2. The chair of claim 1,wherein each of the legs of the first side rails has an inclined bottom.